python JSON文件

1.json.dump() 把json存储到文件中
2.json.load() 从文件中读取json

import json
nums = [2,3,5,7,8,9]
filename = 'nums.json'
#将json写入相关文件
with open(filename,'w') as nbj:
    json.dump(nums,nbj)
#从文件中读取json
with open(filename,'r') as nbj:
    nums2 = json.load(nbj)

print(nums2)

#合并程序
filename = 'username.json'
try:
    with open(filename,'r') as fobj:
        username = json.load(fobj)
except FileNotFoundError:
    username = input('what is your name?')
    with open(filename,'w') as fobj:  #此处会在当前目录自动创建文件
        json.dump(username,fobj)
        print('already remember')

else:
    print('welcome back ' + username) #有内容就直接输出

输出控制台

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